Vulnerability Name:

CVE-2020-17509 (CCN-194553)

Assigned:2020-12-02
Published:2020-12-02
Updated:2021-01-15
Summary:ATS negative cache option is vulnerable to a cache poisoning attack. If you have this option enabled, please upgrade or disable this feature. Apache Traffic Server versions 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0 are affected.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N)
3.5 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
2.6 Low (CCN CVSS v2 Vector: AV:N/AC:H/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-444
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2020-17509

Source: XF
Type: UNKNOWN
apache-cve202017509-sec-bypass(194553)

Source: CCN
Type: Apache Mailing List, 2020/12/02 19:19:31
Apache Traffic Server negative cache option is vulnerable to a cache poisoning attack

Source: MISC
Type: Mailing List, Vendor Advisory
https://lists.apache.org/thread.html/raa9f0589c26c4d146646425e51e2a33e1457492df9f7ea2019daa6d3%40%3Cannounce.trafficserver.apache.org%3E

Source: CCN
Type: Apache Web site
Apache Traffic Server

Vulnerable Configuration:Configuration 1:
  • cpe:/a:apache:traffic_server:*:*:*:*:*:*:*:* (Version >= 6.0.0 and <= 6.2.3)
  • OR cpe:/a:apache:traffic_server:*:*:*:*:*:*:*:* (Version >= 7.0.0 and <= 7.1.10)
  • OR cpe:/a:apache:traffic_server:*:*:*:*:*:*:*:* (Version >= 8.0.0 and <= 8.0.7)

    • Configuration CCN 1:
  • cpe:/a:apache:traffic_server:6.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:apache:traffic_server:7.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:apache:traffic_server:6.2.3:*:*:*:*:*:*:*
  • OR cpe:/a:apache:traffic_server:8.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:apache:traffic_server:7.1.10:*:*:*:*:*:*:*
  • OR cpe:/a:apache:traffic_server:8.0.7:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    apache traffic server *
    apache traffic server *
    apache traffic server *
    apache traffic server 6.0.0
    apache traffic server 7.0.0
    apache traffic server 6.2.3
    apache traffic server 8.0.0
    apache traffic server 7.1.10
    apache traffic server 8.0.7